CONSOLIDATED STATEMENTS OF OPERATIONS (KILROY REALTY, L.P.) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue, Product and Service [Extensible List]	Service [Member]	Service [Member]
REVENUES
Rental income (Note 9)	$ 272,546	$ 230,720	$ 804,330	$ 689,849
Other property income	3,412	1,606	8,313	4,106
Total revenues	275,958	232,326	812,643	693,955
EXPENSES
Property expenses	52,075	40,842	147,421	120,183
Real estate taxes	27,415	24,153	78,718	71,528
Ground leases	1,771	1,708	5,473	5,559
General and administrative expenses (Note 8)	23,524	22,990	68,425	69,482
Leasing costs	1,015	798	3,475	2,373
Depreciation and amortization	81,140	73,213	266,215	222,734
Total expenses	186,940	163,704	569,727	491,859
OTHER INCOME (EXPENSES)
Interest and other income, net	295	976	501	3,686
Interest expense (Note 4)	(19,982)	(16,105)	(60,728)	(59,829)
Gain on sale of depreciable operating property (Note 3)	17,329	0	17,329	457,831
Total other (expenses) income	(2,358)	(15,129)	(42,898)	401,688
NET INCOME	86,660	53,493	200,018	603,784
Total income attributable to noncontrolling interests	(6,903)	(6,465)	(20,028)	(23,286)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 79,757	$ 47,028	$ 179,990	$ 580,498
Net income available to common stockholders per share – basic (in dollars per share)	$ 0.68	$ 0.40	$ 1.53	$ 4.98
Net income available to common stockholders per share – diluted (in dollars per share)	$ 0.68	$ 0.40	$ 1.53	$ 4.96
Weighted average common shares outstanding – basic (in shares)	116,872,953	116,456,796	116,782,621	116,418,113
Weighted average common shares outstanding – diluted (in shares)	117,242,411	116,962,680	117,163,149	116,894,434
Kilroy Realty L.P.
Revenue, Product and Service [Extensible List]	Service [Member]	Service [Member]
REVENUES
Rental income (Note 9)	$ 272,546	$ 230,720	$ 804,330	$ 689,849
Other property income	3,412	1,606	8,313	4,106
Total revenues	275,958	232,326	812,643	693,955
EXPENSES
Property expenses	52,075	40,842	147,421	120,183
Real estate taxes	27,415	24,153	78,718	71,528
Ground leases	1,771	1,708	5,473	5,559
General and administrative expenses (Note 8)	23,524	22,990	68,425	69,482
Leasing costs	1,015	798	3,475	2,373
Depreciation and amortization	81,140	73,213	266,215	222,734
Total expenses	186,940	163,704	569,727	491,859
OTHER INCOME (EXPENSES)
Interest and other income, net	295	976	501	3,686
Interest expense (Note 4)	(19,982)	(16,105)	(60,728)	(59,829)
Gain on sale of depreciable operating property (Note 3)	17,329	0	17,329	457,831
Total other (expenses) income	(2,358)	(15,129)	(42,898)	401,688
NET INCOME	86,660	53,493	200,018	603,784
Total income attributable to noncontrolling interests	(6,239)	(6,005)	(18,333)	(17,586)
NET INCOME AVAILABLE TO COMMON STOCKHOLDERS (UNITHOLDERS)	$ 80,421	$ 47,488	$ 181,685	$ 586,198
Net income available to common stockholders per share – basic (in dollars per share)	$ 0.68	$ 0.40	$ 1.53	$ 4.98
Net income available to common stockholders per share – diluted (in dollars per share)	$ 0.68	$ 0.40	$ 1.53	$ 4.96
Weighted average common shares outstanding – basic (in shares)	118,023,527	117,607,370	117,933,195	117,568,687
Weighted average common shares outstanding – diluted (in shares)	118,392,985	118,113,254	118,313,723	118,045,008